Landracing Forum
Tech Information => Technical Discussion => Topic started by: azgearhed on January 16, 2013, 07:18:59 PM
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I'm putting two motors together for this year and I want to use valve spring oilers. I'm using some T & D rockers that have a spring sprayer hole on one of the motors, but the other motor has a custom fabbed valve cover on one side. (it is clearanced for a centrifugal blower) so I can't use the 3/8" spacer type oiler. Any one know of a kit or plans for valve cover oil manifold? What about orifice size?
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gearhed,
About 20 years ago, valve spring oiling (cooling) was a new & novel concept. We fabbed up what we needed in the prototype shop. I spec'd the orfice size at .020" (#76) to .029" (#69) Spray was from small aluminum blocks drilled to the orfice size. Spray was aimed @ the retainer bottom (high side). Tiny spray nozzles would be better, but I don't know where to look for them.
Worked like a champ, but the engines were seriously dry sumped, ie: a pressure segment for both heads & a scavenge for each head.
I personally don't know about kits, but I'll bet current Nascar engines have this technology...........
:cheers:
Fordboy
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gearhed,
About 20 years ago, valve spring oiling (cooling) was a new & novel concept. We fabbed up what we needed in the prototype shop. I spec'd the orfice size at .020" (#76) to .029" (#69) Spray was from small aluminum blocks drilled to the orfice size. Spray was aimed @ the retainer bottom (high side). Tiny spray nozzles would be better, but I don't know where to look for them.
Worked like a champ, but the engines were seriously dry sumped, ie: a pressure segment for both heads & a scavenge for each head.
I personally don't know about kits, but I'll bet current Nascar engines have this technology...........
:cheers:
Fordboy
How about using cab jets??? Saw some nascar valve covers on fleabay that had the rigs installed on them. Weren't cheap.
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You'll get a better spray (smaller droplets, more range) with .020", but I've read that apertures below about .030" tend to clog.
Crude method: lengthwise thick-walled alum cylinder with pressure feed at either (or both) end(s), OD small enough to miss the flying bits, ID is distribution. Tube can pass out of both ends of valve cover, thread the ends and use Stat-O-Seals and nuts for leakage.
Drill 1/32" holes as needed; the tube can be rotated to clock the spray where you want it. If the X-area of the tube is small, use smaller holes closer to the pressure feed.
Important: use a fixture for drilling, the hole edges must be sharp and identical.
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An alternative to drilling .020" holes would be to silver solder in short lengths of tube . McMaster #89895K115 is 1/8" x .049" wall (.027" ID) 304 SS . Think I'll make mine that way .
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Instead of reinventing the wheel, you could go with a proven available setup. Moroso makes SBC (68329), SBF (68339) and SB MOPAR valve covers with built in oilers. I have used them for years and never had an issue with clogging.
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I have a new set of valve spring oilers that I bought for our engine but they due not fit the RFE heads. They are for the standard 24 degree BBC heads. They are CNC alum. plates that fit between the heads and valve covers. Let me know if you are interested and I will send you a pic. I am asking $150 plus shipping.